JP2009295451A - Far-infrared panel heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a far-infrared panel heater which emits far-infrared rays from the whole surface of a plate-shape heater and irradiates softly far-infrared rays from a wide range to the object and suppresses transmission of heat to the rear direction. <P>SOLUTION: The far-infrared panel heater includes an electric heating plate 7 formed by winding an electric heater 6 on a core plate 5 consisting of an insulator, a heater body 4 is formed by pinching the electric heating plate 7 by an insulating plate 8, and the heating body 4 is installed on the rear face of a metal plate 2, while a refractory mortar 9 is filled at the rear face of the heating body 4, and ceramic 3 which emits far-infrared rays by heating is coated on the front surface of the metal plate 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a far-infrared heater, and more particularly to a far-infrared panel heater that emits far-infrared rays from the entire surface of a plate-like heater.

  Conventionally, many heaters using far-infrared rays have been used in fields such as electric kotatsu, heaters, dryers, and cooking utensils. These far-infrared heaters have a surface coated with a ceramic having a property of emitting far-infrared rays by heating. Usually, as disclosed in Japanese Patent Application Laid-Open No. 11-86804, glass enclosing an electric heater is used. The surface of the tube is coated with the ceramic.

  However, far-infrared rays have properties similar to those of light rays, and have a property of going straight from a radiation source. Therefore, when used in a dryer, etc., the rod-shaped heater as described above has high luminance, and far infrared rays are irradiated only from a specific angle to the object. It is difficult to irradiate the object evenly.

  In view of such circumstances, the applicant first invented a far-infrared panel heater, and applied for a patent on the invention and published as Japanese Patent Application Laid-Open No. 2007-333250. In this device, an electric heater is wound around a core plate made of an insulator, and both sides thereof are sandwiched between insulating plates to form a heating element. The heating element is attached to the back surface of the metal plate, and the surface of the metal plate is heated by heating. A ceramic that emits far-infrared radiation.

However, in this structure, in order to radiate far-infrared rays from the surface of the metal plate, a heating element is provided on the back surface of the metal plate to heat the metal plate, so that heat is also emitted from the heating element to the back side of the panel heater. It will be. Further, since the far infrared panel heater is used by being attached to a flat surface such as a wall, the wall or the like to which the panel heater is attached is heated by the heat of the heating element, and there is a possibility that the heat causes deterioration or deterioration.
Japanese Patent Laid-Open No. 11-86804 JP 2007-333250 A

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a far-infrared panel heater that can suppress the transfer of heat toward the back surface and can efficiently radiate far-infrared rays from the surface. It is.

  Thus, the present invention forms an electric heating plate by winding an electric heater around a core plate made of an insulator, forms the heating element by sandwiching the electric heating plate with the insulating plate, and forms the heating element on the back surface of the metal plate. , And the back surface of the heating element is filled with refractory mortar, and the surface of the metal plate is coated with ceramic that emits far infrared rays by heating.

  According to the present invention, when the metal plate is heated by the heating element, far infrared rays are emitted from the ceramic coated on the surface of the metal plate. In addition to softly irradiating far-infrared rays from a wide angle, even if there are some obstacles, no shadow is produced, and irradiation can be performed uniformly throughout.

  In addition, since the refractory mortar is filled on the back side of the heating element, the refractory mortar blocks heat from the heating element in the reverse direction, preventing deterioration and deterioration of the wall or the like to which the panel heater is attached. Since the metal plate is effectively heated in the direction of the surface, the radiation efficiency of far infrared rays is improved.

  Embodiments of the present invention will be described below with reference to the drawings. The drawing shows a far-infrared panel heater 1 according to the present invention, wherein 2 is a dish-like metal plate having a recessed back surface, and the surface of the metal plate 2 is coated with a ceramic 3 that emits far-infrared rays by heating. ing.

  A heating element 4 is attached in the recess on the back surface of the metal plate 2. The heating element 4 is formed by sandwiching an electric heating plate 7 formed by winding an electric heater 6 around a core plate 5 made of an insulator such as mica, and an insulating plate 8 such as mica. The back surface of the heating element 4 is filled with a refractory mortar 9 in the recess of the metal plate 2, and the heating element 4 is embedded in the refractory mortar 9.

  Thus, when the electric heater 6 is energized, the electric heater 6 generates heat, and the metal plate 2 is heated through the insulating plate 8, whereby the ceramic 3 coated on the surface of the metal plate 2 becomes far-infrared. Radiate.

  On the other hand, a part of the heat generated from the electric heater 6 is also conducted in the direction of the back surface, but since the back surface of the heating element 4 is filled with the refractory mortar 9, the heat conduction is blocked by the refractory mortar 9. In addition, since heat transfer in the back direction is suppressed and heat transfer in the front direction is promoted, the metal plate is heated more strongly and radiates far infrared rays efficiently.

  In the drawing, the metal plate 2 is formed in a substantially square shape, and the surface thereof is coated with a ceramic 3, but the shape is not limited to a square shape, but a circle, a triangle, a hexagon, and other shapes. Furthermore, it can also be made into the special shape designed by the use and use condition of the far-infrared panel heater 1.

  Further, the surface of the metal plate 2 is not required to be a complete flat surface, and may have some irregularities such as corrugations. However, it is preferable that the heating element 4 is in close contact with the back surface of the metal plate 2 in more than half of the area of the heating element 4.

Front view of far infrared panel heater of the present invention Expanded sectional view along the line II-II in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Far-infrared panel heater 2 Metal plate 3 Ceramic 4 Heating element 5 Core plate 6 Electric heater 7 Electric heating plate 8 Insulation plate 9 Fireproof mortar

Claims (1)

An electric heater (6) is wound around a core plate (5) made of an insulator to form an electric heating plate (7), and the electric heating plate (7) is sandwiched between insulating plates (8) to form a heating element (4). And forming the heating element (4) on the back surface of the metal plate (2), filling the back surface of the heating element (4) with a refractory mortar (9), and heating the surface of the metal plate (2) by heating. Far-infrared panel heater, characterized by being coated with ceramic (3) that emits far-infrared radiation

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